How To Fix GS090 - Only basic sets can begin with '0W'.

SAP Error Message - Details

• Message type: E = Error

• Message class: GS - Sets

• Message number: 090

• Message text: Only basic sets can begin with '0W'.

What causes this issue?

'0W' as the beginning of a set name is reserved exclusively for basic
sets belonging to WBS elements.
These sets are designed especially to show the intervals in the WBS
elements. When the sets are imported from the WBS element's master
data, they are then broken down by the set manager into their individual
values. They can only be created as basic sets belonging to table
fields with the domain PS_POSNR, that is, for example, PRPS-PSPNR.

System Response

The set cannot be created.

How to fix this error?

If you want to create a '0W' set, it must be a basic set.
If you want to create a different type of set, the set name cannot begin
with '0W'.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GS090 - Only basic sets can begin with '0W'. ?

  The SAP error message GS090, which states "Only basic sets can begin with '0W'," typically occurs in the context of SAP's data warehousing or reporting environments, particularly when dealing with InfoObjects and their characteristics.
  Cause:
  The error arises when you attempt to create or modify a characteristic or an InfoObject that starts with the prefix '0W'. In SAP BW (Business Warehouse), certain naming conventions are enforced, and '0W' is reserved for basic sets. If you try to create a characteristic or InfoObject with this prefix that is not a basic set, the system will throw this error.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Rename the InfoObject: If you are trying to create a new InfoObject or characteristic, choose a different prefix that does not start with '0W'. For example, you could use '0X', '0Y', or any other valid prefix that is not reserved.
  
  
  Check Existing Objects: If you are modifying an existing InfoObject, ensure that it is indeed a basic set. If it is not, you may need to change its type or create a new InfoObject with a valid name.
  
  
  Review Naming Conventions: Familiarize yourself with SAP's naming conventions for InfoObjects and characteristics to avoid similar issues in the future. SAP has specific prefixes for different types of objects, and adhering to these conventions is crucial.
  
  
  Consult Documentation: If you are unsure about the naming conventions or the types of InfoObjects, refer to the SAP documentation or help resources for guidance.
  
  
  Related Information:
  
  SAP BW InfoObjects: InfoObjects are the building blocks of SAP BW data modeling. They can represent characteristics, key figures, or other data elements.
  Basic Sets: Basic sets are a specific type of InfoObject that can be used for certain types of data aggregation and reporting.
  SAP Notes: Check SAP Notes for any updates or specific guidance related to this error message, as there may be patches or additional information provided by SAP.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP BW expert for further assistance.